Measurement of the prompt-production cross-section ratio s ( ? c 2 ) / s ( ? c 1 ) in p Pb collisions at s N N = 8.16 TeV
Measurement of the prompt-production cross-section ratio s ( ? c 2 ) / s ( ? c 1 ) in p Pb collisions at s N N = 8.16 TeV
复制标题
s N N = 8.16 TeV 下 p Pb 碰撞中即时生产截面比 s ( ? c 2 ) / s ( ? c 1 ) 的测量
DOI：
10.1103/physrevc.103.064905
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发表时间：
2021
影响因子：
3.1
通讯作者：
Aaij R
中科院分区：
文献类型：
--
作者：
Aaij R
本文报告了大型强子对撞机能量下核碰撞中瞬发和鲎产生的首次测量。横截面比是在 TeV 碰撞中测量的，并通过 LHCb 实验收集。通过衰变为介子，随后衰变成一对带相反电荷的μ子和光子，状态被重建，光子在量热计中或通过其在探测器材料中的转换被重建。横截面比与所考虑的两个快速区域中的统一一致。与先前由 LHCb 合作组织在碰撞中测量的相应横截面比进行比较表明， 和 状态类似地受到碰撞中发生的核效应的影响。
This article reports the first measurement of promptandcharmonium production in nuclear collisions at Large Hadron Collider energies. The cross-section ratiois measured incollisions atTeV, collected with the LHCb experiment. Thestates are reconstructed via their decay to ameson, subsequently decaying into a pair of oppositely charged muons, and a photon, which is reconstructed in the calorimeter or via its conversion in the detector material. The cross-section ratio is consistent with unity in the two considered rapidity regions. Comparison with a corresponding cross-section ratio previously measured by the LHCb Collaboration incollisions suggests thatandstates are similarly affected by nuclear effects occurring incollisions.